Abstract The background and potential of Scottish vitrified forts for TL dating were outlined at the last Specialist Seminar together with a dosimetric survey and feasibility study based on destratified samples from museum collections. It was concluded that the material was worthwhile, both from the archaeological point of view, and for the opportunity to work on large, synchronously fired samples with geologically monogenetic minerals. Six sites were selected for more detailed study and samples extracted from infinite gamma matrices using a diamond coring technique. Problems were encountered when attempting to apply the quartz inclusion technique, due mainly to severe supralinearity of the dose response of the high temperature TL signals. Evidence for competition between high temperature and low temperature TL peaks was obtained, which invalidates the use of ambient laboratory irradiation to construct meaningful dose-response curves. Feldspar inclusion techniques were therefore used to obtain TL dates from the sites of Finavon (Angus), Tap O'Noth (Grampian), Craig Phadrig (Inverness), Knockfarrel (Dingwall), Langwell Dun (Strathoykel) and Dun Lagaidh (Loch Broom). The results range from the late 3rd millenium BC to the late 1st millenium AD, extending the timespan over which vitrified forts occur, and suggesting that these monuments cannot be ascribed to a single archaeological period. TL dating therefore appears to be well suited to establishing the relationship between site morphology and chronology for this class of monuments.